Senior Fintech Systems Architect

FIS; Warszawa; On-site; PLN 176,000 - 281,000; Full time

Benefits offered by this job

Impact in fintech

Learning & development

Inclusive, diverse environment

Community involvement

Competitive salary & benefits

Job summary

FIS in Warsaw seeks a Senior Software Architect to lead strategy and execution for performance, reliability, and resilience engineering of enterprise-grade payments applications.

You will drive non-functional quality, design tests, and optimize across Java apps, databases, and middleware while mentoring engineers and embedding quality in the SDLC. This role blends hands-on development with architectural leadership in a regulated fintech environment.

Qualifications

• Senior Software Architect responsible for performance, reliability and resilience engineering for enterprise-grade applications.
• Design CI-driven quality gates and automated tests to ensure software quality.
• Expertise in Java technologies (JDK 8/17, JEE, Maven, Hibernate, EJB, MQ, SQL, REST, XML/XSD, JSON).

Responsibilities

• Lead non-functional quality strategy across performance, scalability, resilience, and availability.
• Design and execute performance, load, stress, and endurance testing.
• Analyze system behavior using monitoring and observability tools.
• Partner with engineering and architecture teams to embed quality early in the SDLC.
• Drive performance optimization across Java applications, databases, and middleware.
• Establish CI-driven quality gates using automated functional and non-functional tests.
• Validate applications across application servers and containerized environments.
• Troubleshoot complex production issues and lead root-cause analysis.
• Mentor engineers on non-functional testing practices and quality standards.
• Extensive hands-on experience in application development and quality engineering.
• Strong expertise in Java (JDK 8/17), JEE, Maven, Hibernate, EJB, MQ, SQL, REST, XML/XSD, JSON.
• Proven experience monitoring and analyzing application performance.
• Advanced skills in performance, high-availability, and resilience testing.
• Experience with CI/CD pipelines and automated test frameworks (e.g., Jenkins).
• Knowledge of application servers (WebSphere, WebLogic, JBoss, Open Liberty).
• Strong database experience with Oracle or PostgreSQL, including performance tuning.
• Proficiency in Linux-based and containerized environments.
• Experience with Docker and Kubernetes in production.
• Knowledge of Kafka or event-driven architectures.
• Experience in payments domains (e.g., SEPA, SWIFT).
• Advanced REST API design and optimization skills.
• Deep PostgreSQL performance and scalability expertise.

Skills

Java

JEE

Hibernate

EJB

MQ

SQL

REST

XML/XSD

JSON

PostgreSQL

Oracle

WebSphere

WebLogic

JBoss

Open Liberty

CI/CD

Jenkins

Kubernetes

Docker

Linux

Monitoring/Observability

Performance Tuning

Event-driven architecture

Kafka

Tools

Maven

Jenkins

Docker

Kubernetes

WebSphere

WebLogic

Open Liberty

Oracle

PostgreSQL

Job description

FIS in Warsaw seeks a Senior Software Architect to lead strategy and execution for performance, reliability, and resilience engineering of enterprise-grade payments applications.

You will drive non-functional quality, design tests, and optimize across Java apps, databases, and middleware while mentoring engineers and embedding quality in the SDLC. This role blends hands-on development with architectural leadership in a regulated fintech environment.